-/*\r
- * Mesa 3-D graphics library\r
- * Version: 4.0\r
- * \r
- * Copyright (C) 1999 Brian Paul All Rights Reserved.\r
- * \r
- * Permission is hereby granted, free of charge, to any person obtaining a\r
- * copy of this software and associated documentation files (the "Software"),\r
- * to deal in the Software without restriction, including without limitation\r
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,\r
- * and/or sell copies of the Software, and to permit persons to whom the\r
- * Software is furnished to do so, subject to the following conditions:\r
- * \r
- * The above copyright notice and this permission notice shall be included\r
- * in all copies or substantial portions of the Software.\r
- * \r
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS\r
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\r
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN\r
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
- */\r
-\r
-/*\r
- * DOS/DJGPP device driver v0.3 for Mesa 4.0\r
- *\r
- * Copyright (C) 2002 - Borca Daniel\r
- * Email : dborca@yahoo.com\r
- * Web : http://www.geocities.com/dborca\r
- */\r
-\r
-\r
-#include <dpmi.h>\r
-\r
-#include "dpmiint.h"\r
-\r
-\r
-\r
-/* _create_linear_mapping:\r
- * Maps a physical address range into linear memory.\r
- */\r
-static int _create_linear_mapping (unsigned long *linear, unsigned long physaddr, int size)\r
-{\r
- __dpmi_meminfo meminfo;\r
-\r
- if (physaddr >= 0x100000) {\r
- /* map into linear memory */\r
- meminfo.address = physaddr;\r
- meminfo.size = size;\r
- if (__dpmi_physical_address_mapping(&meminfo) != 0)\r
- return -1;\r
-\r
- *linear = meminfo.address;\r
- } else {\r
- /* exploit 1 -> 1 physical to linear mapping in low megabyte */\r
- *linear = physaddr;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-\r
-\r
-/* _remove_linear_mapping:\r
- * Frees the DPMI resources being used to map a linear address range.\r
- */\r
-static void _remove_linear_mapping (unsigned long *linear)\r
-{\r
- __dpmi_meminfo meminfo;\r
-\r
- if (*linear) {\r
- if (*linear >= 0x100000) {\r
- meminfo.address = *linear;\r
- __dpmi_free_physical_address_mapping(&meminfo);\r
- }\r
-\r
- *linear = 0;\r
- }\r
-}\r
-\r
-\r
-\r
-/* _create_selector:\r
- * Allocates a selector to access a region of linear memory.\r
- */\r
-int _create_selector (int *segment, unsigned long base, int size)\r
-{\r
- /* allocate an ldt descriptor */\r
- if ((*segment=__dpmi_allocate_ldt_descriptors(1)) < 0) {\r
- *segment = 0;\r
- return -1;\r
- }\r
-\r
- /* create the linear mapping */\r
- if (_create_linear_mapping(&base, base, size)) {\r
- __dpmi_free_ldt_descriptor(*segment);\r
- *segment = 0;\r
- return -1;\r
- }\r
-\r
- /* set the descriptor base and limit */\r
- __dpmi_set_segment_base_address(*segment, base);\r
- __dpmi_set_segment_limit(*segment, MAX(size-1, 0xFFFF));\r
-\r
- return 0;\r
-}\r
-\r
-\r
-\r
-/* _remove_selector:\r
- * Frees a DPMI segment selector.\r
- */\r
-void _remove_selector (int *segment)\r
-{\r
- if (*segment) {\r
- unsigned long base;\r
- __dpmi_get_segment_base_address(*segment, &base);\r
- _remove_linear_mapping(&base);\r
- __dpmi_free_ldt_descriptor(*segment);\r
- *segment = 0;\r
- }\r
-}\r
+/*
+ * Mesa 3-D graphics library
+ * Version: 4.0
+ *
+ * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * DOS/DJGPP device driver v1.5 for Mesa
+ *
+ * Copyright (C) 2002 - Borca Daniel
+ * Email : dborca@yahoo.com
+ * Web : http://www.geocities.com/dborca
+ */
+
+
+#include <dpmi.h>
+
+#include "internal.h"
+
+
+#ifndef MAX
+#define MAX(x, y) (((x) < (y)) ? (y) : (x))
+#endif
+
+
+/* _create_linear_mapping:
+ * Maps a physical address range into linear memory.
+ */
+int
+_create_linear_mapping (unsigned long *linear, unsigned long physaddr, int size)
+{
+ __dpmi_meminfo meminfo;
+
+ if (physaddr >= 0x100000) {
+ /* map into linear memory */
+ meminfo.address = physaddr;
+ meminfo.size = size;
+ if (__dpmi_physical_address_mapping(&meminfo) != 0) {
+ return -1;
+ }
+
+ *linear = meminfo.address;
+ } else {
+ /* exploit 1 -> 1 physical to linear mapping in low megabyte */
+ *linear = physaddr;
+ }
+
+ return 0;
+}
+
+
+/* _remove_linear_mapping:
+ * Frees the DPMI resources being used to map a linear address range.
+ */
+void
+_remove_linear_mapping (unsigned long *linear)
+{
+ __dpmi_meminfo meminfo;
+
+ if (*linear) {
+ if (*linear >= 0x100000) {
+ meminfo.address = *linear;
+ __dpmi_free_physical_address_mapping(&meminfo);
+ }
+
+ *linear = 0;
+ }
+}
+
+
+/* _create_selector:
+ * Allocates a selector to access a region of linear memory.
+ */
+int
+_create_selector (int *segment, unsigned long base, int size)
+{
+ /* allocate an ldt descriptor */
+ if ((*segment=__dpmi_allocate_ldt_descriptors(1)) < 0) {
+ *segment = 0;
+ return -1;
+ }
+
+ /* create the linear mapping */
+ if (_create_linear_mapping(&base, base, size)) {
+ __dpmi_free_ldt_descriptor(*segment);
+ *segment = 0;
+ return -1;
+ }
+
+ /* set the descriptor base and limit */
+ __dpmi_set_segment_base_address(*segment, base);
+ __dpmi_set_segment_limit(*segment, MAX(size-1, 0xFFFF));
+
+ return 0;
+}
+
+
+/* _remove_selector:
+ * Frees a DPMI segment selector.
+ */
+void
+_remove_selector (int *segment)
+{
+ if (*segment) {
+ unsigned long base;
+ __dpmi_get_segment_base_address(*segment, &base);
+ _remove_linear_mapping(&base);
+ __dpmi_free_ldt_descriptor(*segment);
+ *segment = 0;
+ }
+}
+
+
+/* Desc: retrieve CPU MMX capability
+ *
+ * In : -
+ * Out : FALSE if CPU cannot do MMX
+ *
+ * Note: -
+ */
+int
+_can_mmx (void)
+{
+#ifdef USE_MMX_ASM
+ int x86_cpu_features = 0;
+ __asm("\n\
+ pushfl \n\
+ popl %%eax \n\
+ movl %%eax, %%ecx \n\
+ xorl $0x200000, %%eax\n\
+ pushl %%eax \n\
+ popfl \n\
+ pushfl \n\
+ popl %%eax \n\
+ pushl %%ecx \n\
+ popfl \n\
+ xorl %%ecx, %%eax \n\
+ jz 0f \n\
+ movl $1, %%eax \n\
+ cpuid \n\
+ movl %%edx, %0 \n\
+ 0: \n\
+ ":"=g"(x86_cpu_features)::"%eax", "%ebx", "%ecx", "%edx");
+ return (x86_cpu_features & 0x00800000);
+#else
+ return 0;
+#endif
+}
projects / mesa.git / blobdiff